Alan, after quarreling with his girlfriend Sheila, becomes intrigued by Anna, a mysterious widow who's searching for a sailor she had known many years before. Alan and Anna begin the search on board a yacht bound for Greece, but they don't find the sailor. After a stop in Africa, Louis de Mozambique joins the party and suggests that the sailor may never have existed other than in Anna's mind.
| Actor | Role |
|---|---|
 Jeanne MoreauAnna | Anna |
 Ian BannenAlan | Alan |
 Vanessa RedgraveSheila | Sheila |
 Zia MohyeddinNoori | Noori |
 Orson WellesLouis de Mozambique | Louis de Mozambique |
 Hugh GriffithLlewellyn | Llewellyn |
 John HurtJohn | John |
 Umberto OrsiniPostcard Vendor | Postcard Vendor |
 Eleonora BrownCarla | Carla |
| EErminio SpallaEolo | Eolo |
 Gabriella PallottaGirl at Dance | Girl at Dance |
 Arnoldo FoàMan on Train | Man on Train |
| CClaudio de RenziJeannot | Jeannot |
 Fausto TozziCaptain | Captain |
| TTheodoros RoubanisTheo (as Theo Roubanis) | Theo (as Theo Roubanis) |
 Massimo SarchielliMassimo | Massimo |
 Guglielmo SpoletiniGuglielmo | Guglielmo |
 Wolfgang HillingerWolf | Wolf |